Heating stove



VMay 8, 1928.

' A. CLARKE HEATING sTovEt May 8, 1928.

A. CLARKE HEATING sTovE 5 Sheets-Sheet 2 Filed June l5, 1927 May 8,1928.

A. CLARKE HEATING STOVE Filed June l5. 1927 5 Sheets-Sheet 5 PatentedMay 8,- 1928.

UNITED STATES nur cmnxa, or cmcxeo, rumors., :marmo srova.

application med I une'us, 1927. semi no. manos.`

My invention relates to heating stoves.I

More particularly my invention relates to an improved hea-ting stovewhich is more eiiicient, more economically operated and cheaper toconstruct. n

Due to the abundant supply of gas and its low cost, gas heated stovesare extensively used. There is a growing tendenc to heat b gas becauseof the cost and di culty of o taining high grade coal and fuel oil`However, certain drawbacks have been encountered due to improperlyconstructed. heaters and their ineliclent methods of heating.Attempts-to obtain maximum conduction of heat from the heating zones tothe radiating zone have been unsuccessful. It seems that ditiiculty hasbeen experienced in preventing the escape of the products of combustion,and consequently, eorts have been directed towards ra id withdrawal ofAthe products of combustion, with little attention given to theresultant loss of heat.

An object of my invention is to provide4 an improved structure, whichovercomes these difficulties of the prior art, and inwhich the gas iseconomically burned. Maximum. conduction of heat is obtained to secureincreased heat radiation and elliciency.

I preferably provide two air supply chambers, one located below `theheating chamberand the other adjacent to the heating'zone.

'Ihe first chamber functions to furnish an adequate supply of air to theheater so as to maintain eicient combustion, and also to furnish air teheating pipes located in the heating zone.,A The second supply chamberfunctions to su ply air to a second set of heating plipes, a so in theheating zone. Locating t is second supply chamber adjacent to theheating zone allows reheating the air before passing through the heatingzone. Thus, the air is thoroughly heated before it goes to the radiatingchamber, and I have found by actual experiments that the constructionherein provided will radiate the air at a hotter temperature and at agreater dista-nce than heretofore.

'lo obtain maximum conduction .of the heat from the heating zone totheheating pipes, a flue attachment is provided which efiicicntly withdrawsall gases` of combus-` tion to n'event the esca e of offensive odors,but which retards theraft long enough to allow this maximum conductionof heat from the heating zone to the heating pipes.

at 18 to a gas supply, if so pipe 17 being furmshed with a plurality ofFurther objects and advantages of my invention will be apparent from thefollowin description when taken in connection wit the accompanyingdrawings.

In thev drawings:

Figure l is a. vertical 'sectional view of a heating stove embodying myinvention;

Fig. 2 is a horizontal sectional view taken on line 2-2 0f Fig. 1;'

Fig. 3 is a similar view taken on line 3-3 of Fig. 1;

Fig. 4 is a vertical sectional view of an alternative embodiment; and

Fig. 5 is a perspective view of a portion of the device.

A heating -stove embodyin .my invention comprises a base 5 provider?with suitable supporting means, such as le s 6. An air supply chamber 7is mounted irectl above the base 5, this chamber having a p urality ofopenings 8 and 9 in the floor 10. Casing 11 of the heating stove may beformed in any manner and ispreferably provided with a horizontalpartition l2 servlng as the upperwall of air supply chamber 7. A heatmgchamber 14 is disposed above the air supply chamber 7 and 'isadapted toreceive a fuel supply pipe 17 arranged to be supported in the side wallsand 16 of casing 11. Pipe 17. may be suitabl connected esired this urnerjets 20. A door 21 is suitably connected at the front of casing 11toprovide `access to the burners 20.

-A- second horizontal ypartition 22 is provided in casin 11, whichconnects with the front wall an a vertical inner partition 23 disposed ajacent to rear wall 24. Between the partitional wall 22 and the top wall25 of casin 11 is provided a radiating or heated cham er 13, to whichthe heated airis condlfcted for radiation from the stove.

A second air supply chamber is provided in the device herein disclosed,this supply chamber being designated-26 and mounted transversely in theheating chamber 14 adjacent to the heating zone. Chamber 26 may befurnished with side openin s 27 and 28 in the side walls 15 and 16 to aow sufcient circulation of fresh air which is fed upwardly through a setof vertical stacks or heating pipes 29. These plies are adapted toprovide communication etween chamber 26 andl the radiating or heatedchamber 13. A sec- H0 coming from the burners will first circu.

late in and about the vertical pipes 29 and then pass over the upper endof this vertical baiie plate,rfrom where this heated air will be drawndownwardly thoroughly to come into contact with the pipes 3() whereby toheat the air drawn from the lower air supply chamber 7 through thesepipes. The gases of combustion, which are in effect the heated currentsof air, then pass through the pipe 33, feeding into a flue attachment 35com-y prising a housing 36, disposed substantially t0 the rear of theheating stove.

Housing 36 is preferably provided with a baffle 37 having a plurality ofvertical walls 38 functioning to divide the housing into a plurality ofvertical passages, so that the gases of combustion are compelled tomoilfe upwardly substantially in a vertical pat A erforated plate 40 islocated between the pipe 33 and the lower end of the baiile 37. Asecondhorizontal baille plate 42 is mounted directly above the upper end ofthe vertical baiiie 37 and extends slightly'thercover, both of theseplates acting to check the draft, so that the gases of combustion iwillbe slowed up considerably to allow them to remain a maximum time in theheating zone. This action permits maximum conduction of heat from thegases of combustion and heated air in the heating zone to the pipes 29and 3Q so that the air circulating through these plpes will be ofmaximum temperature efore entering the heated chamber 13. The usual fluepipe 43 is attached to opening 44 at theupper end of ilue attachment 35.Such pipe 43 may lead to the usual ue o ening in the building providedto pass o the gases of combustion of a stove of this type.

Spacing the inner partition 23 from the rear wall 24 furnishes a passage45 which tends to accelerate the circulation of hot air through thepipes 29 and 30 by causing a. suction at their upper ends. It alsoserves to supply additional fresh ,air to the radiating chamber 13,which air may -be heated by the hot air coming from pipes 29 and 20.Partition 23 is extended forwardly in a horizontal direction in thechamber 13, as indicated at 47, to allow this additional air to travelforwardly a considerable distance` preferably beyond the points of theopenings of pipes 29 and 30 so that this air is not mingled with the aircoming from pipes 29 and 30 until the latter has circulated into theradiating or heating chamber 13.

It will be observed that a portion of the air supply in'lower chamber 71s drawn through an aperture 48 1n the horizontal partition 12 toprovide proper combustion of the gas burned at the burners 20. This airalso acts to carry the heat from the burners into the heating zone sothat maximum conduction of heat to pipes 29 and 3() will take" place.The remaining supply of `air in chamber 7 is drawn through the verticalpipes 30, and, -as before explained, is heated by the gases ofcombustion which travel downwardly between the vertical baille 31 andthe inner rear partition 23.-

Pipes 29 are provided larger in diameter and circulate a greaterquantity of air through the heating zone because these pipes aredisposed in the hottest portion of this heating zone. Pipes 30 areprovided to insure maximum conduction of the heat by being disposed inthe path of the gases of combustion after they leave the portlon of theheating zone in which pipes 29 are disposed.

Any suitable bracket means 50 may be fur# nished to attachthe flueattachment 35 to the heating stove. I tind that the flue attachment 35adds to the efficiency of the de vice, because it prevents too rapidcirculation of the gases of combustion through the stove, whichotherwise would take place and reduce the time in whichthe heat could beconducted to the pipes 29 and 30, and consequently, the amount of heatthat may be conducted, l1`urthern'iore, this Hue attachnient has beenfound to dccreaise the forma.- t-ion of carbon, due to the amount of airsupplied by chamber 7 and the time in which it is permitted to rcmaiujnthe heating chamber 14 adjacent to the burners 20. The air is thus givenan opportunity to be heated before passing into the heating zone, andsuiiicient oxygen may be drawn therefrom to support proper combustion atthese burners.

The transversely disposed air supply chamber 26 is mounted in thevicinity of the heating zone so that the incoming air will be preheatedbefore it circulates through pipes 29. Allowing the air` which iowsupwardly through the passage 45 at the rear of the device. to travelhorizontally over the baiiie 47 also permits prehcating thereof. Thisair serves the two-fold func tion of increasing the draft through the`pipes 29 and 30 and also `to supplv additional air to the heated chamberfor increased radiation at the mouth 46.

In Fig. 4 I have shown an alternative cui bodiment of my inventionillustrating a different form of flue attachment for the dcvice;otherwise, the structure isisubstantiallv the same as shown in Fig. 1.The tine heat enters the flue attachment b v passing transverselythrough the pipe 33 into an inf verted U-baiile 51 suitably secured inthe y of the stove.

lower portion of this flue attachment. This fiue heat or gases are thendivided so as to pass about the open ends of the U as illustrated at 52in Fig. 5 and also through the apertures 53 in the vertical sides andhorizontal connecting portion of this baffle.

Flue attachment 55 in this embodiment is preferably in the form of arectangular casing 56 seated within the outer covering 57 It ispreferable to provide holes 58 in the base to permit circulation of coldair therethrough into the interior lof the lower portion of the flueattachment 55. This fresh air acts gradually to reduce the temperatureof the fiue heat or gases. To prevent immediate withdrawal of these fluegases before lthey have had adequate time thoroughly to mingle with thisfresh air so as to be reduced in temperature, I provide an arcuatehorizontal baille plate 59 disposed at a slight distance above U-shapedbaille 51, the bafiie 59 being provided with a series of perforations 60which allow slow circulatlon of the reduced fine gases therethrough andvertically upwardly where they pass through a horizontal sleeve 61.Sleeve61 may conneet to 'the usual Hue pipe leading to the outside ofthe house, or if desired, this flue pipe may be omitted to allow thegases to pass directly into the room. I desire to provide a secondarcuate horizontal baffle 62 slightly above the sleeve 61 so as todirect the cooled and expanded fille gases toward the same.

The advantage of this form of the invention is that the gases are soreduced in temperature before expelled that theyhave no harmful effectwhatsoever upon the occupants of the room. On the other hand, byreducing the flue gases, I find that there is not the tendency for astove of this type to Vcause condensation on the windows and walls ofthe rooms in which the stove is used. This is accomplished by having theflue attachment 55 act as a cooling devicefor the gases, so that theywill leave the same practically at the same temperature as that of theroom. To assure that the inner vertical wall 64. of the casing 55 ismaintained cold, I provide a vertical wall 65 spaced to divide theportion between the wall 64 and wall 23 and allow air to circulateupwardly between wall 65 and Wall 64 by firstentering at the base andthereafter feeding into the heated air chamber 13. Cold air maycirculate upwardly from the base between the wall 23 and the wall 65 toabsorb the heat that is conducted through wall 23, which air will alsofeed into the heated air chamber 13. This tends to maintain the dividingwall 65 in a cold state, so that the housing 56 will remain cold andproperly function to cool the exhaust gases before discharged. Ineffect, wall 65 and `casing 57 provides acold chamber `in which flueattachment 55 is disposed, thereby assuring that the attachment'willremain cold to cool thev exhaust gases asthey enter.

Thus, the exhaust gases will be discharged from the stove at a very lowtemperature,

and, as I have found, practically at the same temperature as that of theroom.

An arcuate plate 66 serves to deflect the air, which feeds into casing56 through a series of openings 68, into the heated air chamber 13.effective circulation of cool air in and about casing 56 so as to coolthe exhaust gases as they finally pass therethrough.

lVithout further elaboration, the foregoing will so fully explain thegist of my invention, that others may, by applying current-knowledge,readily adopt the same for use under varying conditions of service,without eliminating certain features, which may properl be said toconstitute the essential items o novelty involved, which items areintended to vbe defined and secured to me by the following claims.

I claim:

1. A stove of the class described comprising a housing dividedhorizontally into a lower chamber, an intermediate chamber and an upperchamber, means for feeding air into said lower chamber to supply a partthereof to said intermediate chamber and a part to said upper chamber,al transverse chamber extending through said intermediate chamber andopen at the ends, and means for conducting the air supplied by saidtransverse chamber to said upper chamber.

2. A stove of the class described comprising a housing dividedhorizontally into a. lower air chamber, an intermediate heating chamberand an upper heated chamber,

.means for supplying air from said lower chamber to said upper chamber,said means passing through said `intermediate chamber, a transversechamber extending across said intermediatev chamber, .and meansproviding communication between said transverse chamber and said upperchamber.

3. A stove of the class described comprising a casing having an airsupply chamber, a heating chamber and a heated chamber, means in saidheating chamber for heating the air supplied thereto, a transversechamber having open ends in said casing. means for conducting air fromsaid air supply chamber through said' heating chamber to be heatedthereby and then to said heated chamber, and means for conducting airfrom said transverse chamber through said heating chamber to be heatedthereby and then to said heated chamber.

4. In a stove of the class described comprising a casing having an airsupply chamber, a heating chamber and a heated chamber` means in saidheating chamber for heating the air supplied thereto, a. transverse Thearrangement affords an y chamber extending crosswise through saidheating chamber to be heated thereby, means for conducting air from saidair supply chamber through said heating chamber to said heated chamber,and means for conducting air from said transverse chamber through saidheating chamber to said heated chamber.

5. A stove of the class described comprising in combination with acasing having three chambers, one constituting an air supply chamber,another a heating chamber for the air, and a third chamber to receiveand radiate the heated air, of a fourth chamber subjected to the heat ofsaid heating chamber for supplying heated air to said heated chamber.

6. A stove of the class described comprising in combination with acasing having three chambers, one chamber constitutingan lair supplychamber, a second chamber constituting a heating chamber, and a thirdchamber serving to receive and radiate the heated air, of a transverselydisposed chamber in said heating chamber, and means for connecting saidtransversely disposed chamber with said heated chamber.

7. A stove of the class described comprising in combination with acasing having an air supply chamber at the base, a heating chamber abovesaid air supply chamber, said heating chamber having ports communicatingwith said air supply chamber, of heating means disposed over said portsto heat the air passing therethrough from sai-d air supply chamber, aheated chamber above said heating chamber, vertically disposed ipes inthe path of the heat currents in said eating chamber, said pipessupplying air from said air supply chamber to said heated chamber, atransversely arranged chamber in said casing,'and a second set ofvertically disposed pipes also in the path of the heat currents in saidheating chamber, said pipes supplying air from said transverselyarranged chamber to said heating chamber.

8. A stove of the class described comprising in combination with acasing having an air supply chamber, a heating chamber disposed oversaid air supply chamber and communicating therewith, a second air supplychamber, a heated chamber disposed above said heating chamber, and means:for connecting said air supply chambers with said heated chamber, saidmeans passing through the heating zone of said heating chamber wherebyto heat the air supplied to said heated chamber. v

9. A stove ot the class described comprising in combination. a casinghaving a heating chamber including a heater and a heatin;r Zone` airsupply chambers in said casing, one of said air supply chambers beingbelow said heating chamber and communicating therewith to supply airthereto for the purpose of supporting combustion at said heater and toprovide heated currents Jfor said heating zone, the other air supplychamber being disposed in said heating chamber adjacent to said heatingzone, a heated chamber above said heating-chamber, and means forconducting the air of said air supply chambers through said heating zoneto said heated chamber.

10. A stove of the class described comprising in combination, a casinghaving a heating chamber including a heater and a heating zone, airsupply chambers in said casino". one of said air supply chambers beingbellow said heating chamber and communieating therewith to supply airthereto for the purpose of supporting combustion at said heater and toprovide heated currents for said heating zone, the other air supplychamber being disposed in said heating chamber adjacent to said heatingzone, a heated chamber above said heatingchamber, means for conductingthe air of said air supply chambers through said heating zone to saidheated chamber, and means for stimulating a circulation of the airconducted through said last means to said heated cham- 11. A stove ofthe class described comprising in. combination, a casing having providedtherein a heating chamber including a heater and a heating zone, aheated chamber, chambers for supplying air to said heating chamber andalso to said heated chamber. means for conducting through said heatingzone the air supplied by said chambers, and means for receiving thegases of combustion from said heating zone, said means having provisions:tor retarding the draft to allow an increased heat conduction to saidair conducting means passing through said heating zone.

12. A stove of the class described comprising in combination with acasing having a heating chamber therein, a heated chamber and means forconducting air to be heated lthrough said heating chamber to said heatedchamber, of a flue attachment comprising a housing, a connection betweensaid heating chamber and the lower end of said housing, and verticallyarranged baie means in said hou-sing, said baie means adording separatevertical passages Jfor imparting vertical movement to the gases otcombustion received from said heating chamber.

V13. A stove of the'class described comprisin'g in combination with aeasing having a heating chamber therein, a heated chamber and means forconducting air to be heated through said heating chamber to said heatedchamber, of a Hue attachment comprising a housing. a connection betweensaid heating chamber and the lower end of said housing, verticallyarranged baiiie means in said housing, and a perforated battle mount-Led in said housing between said connection heating chamber therein, aheated chamberl and means for conducting air to be heated through saidheating chamber to said heated chamber, of a Hue attachment comprising ahousing, a connection between `said heating chamber and the lower end ofsaid housing, vertically arranged baiiie means in said housing, aperforated baliie mounted in s 'd housin between said connection andsaid vertica bao means, and asubstantially horizontally disposed baliiemounted at the upper end of said vertical baliie means.

l5. A stove of the class described comprising in combination with aheating zone,

means for conducting air through said heating zone to be heated thereby,and heat radiating means for receiving the heated air, of a temperaturereducing device for receiving the gases of combustion of said heatingzone, said device having provisions for lowering the temperature of saidgases of combustion to substantially that of the air exterior of thestove.

16. A stove of the class described comprising in combination with aheating zone, of v means for receivingv the gases of combustion of saidheating zone, said means having provisions for dividing the gases ofcombustion as received and intermingling therewith currents of cool airwhereby to lower the temperature before the gases of combus- I tion aredischarged.l

In witness whereof, I have hereunto subscribed my name.

ADAM CLARKE.

